In Bucktown/Wicker Park I have been to both Coast and Mirai. Not sure what you mean when you say "traditional"? Anyway, both are good, Coast is BYO and Mirai has reasonably pricing for alcohol. Both take reservations, and you will need them for either place on Saturday night. I've found it easier to get into Mirai on short notice (prob due to the BYO). Mirai has an upstairs lounge where they also serve, downstairs is normal table, chairs and sushi bar. The upstairs lounge is a bit more romantic, make sure to ask if you can sit there when you make your reservation, if that's something you want.
Coast
(773) 235-5775
2045 N Damen Ave (Armitage Avenue)
http://www.coastsushibar.comMirai
(773) 862 8500
2020 W. Division (Damen Avenue)
http://www.miraisushi.com(edited to add)
While Mirai is out of your referenced area, it's not far out of it, and easy walk from North ave, or you could take the Damen bus
Leek
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